import java.util.Scanner;

public class Test1 {

    public static void main(String[] args) {


        Scanner cin=new Scanner(System.in);

        while(cin.hasNextLine()){
            String s=cin.nextLine();

            char ch=s.charAt(0);

            if(Character.isUpperCase(ch)){
                ch=(char)(ch+32);
            }
            System.out.println(ch);

        }


    }




}
